Restoring a pre-A is a big project! You have many questions!
I will get you started.
1) Engine parts. Some are VW parts, most are special Porsche parts specific to the 2-piece case engines. What do you need?
2) Upholstery. First you need to find out what the original colors were. You should get the report from Reutter for this. See here
. Once you know the colors, then you can start to find suppliers. The carpet is German square weave, and it is "fine" weave. For the top, the fabric can be purchased from Germany, but again, you need to know the color. Building the top is quite a challenge, and having someone do it who has done it before is a good idea. Cabriolets had a mixture of leather and vinyl. Modern leathers are not good - they don't look like the original leather, which was a vegetable-tanned and surface pigment colored. Do you have any of the original carpet, leather, and top material for your car? Did you take lots of photos before and during stripping it?
3) There were a few reds used. The most common for 1954 was Strawberry red (Erdbeerrot) C524. C524A was with a light beige interior and a black or light beige top. C524B was black leather with black or grey top. Again, the Reutter report can help you here. Other reds were Pascha red (Pascharot) and Turkish red (Turkishrot), though I think Turkish red was started on cars a bit later in 1954. Strawberry red is a medium red, and Pascha red is a dark red. Signal red was never used on pre-A coupes or cabs.
4) Restoring your car in Mexico should be fine, but having someone do it who doesn't know Porsches and doesn't know pre-A Porsches is a recipe for disappointment I think. If your body man is very good, he can replicate all the body and chassis panels he needs from the damaged or rusted originals. But other things such as wiring, upholstery and trim require expertise. How complete is your car? If it is very original, then you can just put it back together as it originally was. I hope you took lots of detailed photos when you disassembled it. If not, then you've got a lot of research and work to do. And a lot of headache.
5) Parts. You can't rely on any of the normal Porsche vendors to know anything about pre-A Porsches. Even the well-known suppliers in the USA and Europe. You have to find out for yourself what is the correct part and then find a vendor (or usually another Porsche owner) who has it. That said, there are some that know pre-As better than others. Classic Parts France is good, for instance. As for the battery cover, you already had the original, so why buy a new one? A general rule for pre-A Porsche restoration - don't buy new parts
. They're probably wrong. Especially body panels. Repair the original parts if you have them, or use the original parts as models for making new ones. If you don't know where to find a part, use Google to search this forum. It has probably been discussed before. In the Google search form:
site:forum.porsche356registry.org my search terms
You have to be a bit crazy to want to restore a pre-A Porsche. But there are many of us. =)
Post some more pictures of your car, and ask specific questions. There's a lot of knowledge in this group, and we all love these cars. We're happy to help. And we like photos. =)
Hope this helps!