yep no problem.
you can simply send the design/cadfile/stl to a print bureau and get it made.
Your best bet is probably get it made is Nylon on an sls machine.
Thatw ay it'll be water tight and corrosion resistant as well as long lasting.

Not sure there's anyone offering polyurethane service.
Ah - but you could use ninjatek's armadillo - that's a rigid polyurethane filament.
I;d probably use something like a stiffer flexible pu though. thhat way its got some flex built in.

So, yeah - doable and definitely cheaper than ripping the house to bits.

If you need help designing the part - let me know, part of what i do for a living.