I'm looking at getting some plastic/nylon "things" made that will be used to attach 2 other things together.

Depending how it goes I'll probably need about 4-5 different designs. They can probably all be a 1 piece construction and will be something like a lump of plastic/nylon the size of a smokes packet/mobile phone with a few holes, grooves, and/or slots. Relatively simple - no moving parts or anything like that.

Initially would be looking for about 100 of each design but quite possibly will need more (all going to plan).

Does anyone know where to start with a project like this? Stuff like what to consider in the design, material selection (will need to be non-conductive, pretty UV stable, and strong - other than that no real requirements), who can make them and how much they might be, minimum quantities to make something like this worthwhile etc?

Thanks.