I play about with 3d printers as some of you may know. Dave3d get it? Also I live @ 3 duttons lane by the way.
My car mats are not OEM and don't have plugs unfortunately, otherwise I would have a go. The drawing is 90% of the work. The printing bit is easy. There are plastics out there that are rubbery or flexible but I have not used them as yet. I usually use ABS. I assume the plugs are rubber?
Kurt: could you send me some pics of the parts and I will try and do a parametric design. This means the various dimensions can be varied easily.
Once we have a rough model we could try it out and then fine tune it. I am keen on developing a library for p38 plastic parts.
As an aside, anyone on here done lost wax casting? Print a part in plastic on a 3d printer then use it as a template to cast the part in aluminium.