If i found a file that isnt 1/100 scale but either a bit bigger or smaller could you work with that?
I can scale things up or down. It has the same issue of details perhaps not doing very well if you go a long ways from the original size that a photo has, but +/- 25% shouldn't cause a problem. I would need to know what tube OD/ID to target, but could probably make that work. Note that files need to be in a 3D CAD format or STL. Images like JPEG/PNG/GIF don't have the needed information for generating 3D parts.
I will say that the ones from
www.siriusrocketry.biz look nice. Printed objects have ridges and such from the layered printing process that molded parts like those won't. You can do things like acetone vapor treatment (if printed in ABS) to smooth them out, but you can lose small details in the process.
It's also only fair to say that the Estes parts are probably just fine unless you're planning to put big motors in there.
I know it seems like I'm trying to talk you out of doing business with me, but I don't do it for money, it's more to help fellow rocket builders get what they need. So if there's another part that's a better fit, I think it's rude not to mention it.