oem units are pretty easy to mount LED's into using a drill and waterproof with some glue/sealant, dont cost the earth and come in clear, orange and smoked orange so they are a pretty good option to mod. its a pretty simple bit of kit to mod together, its why i've never sold them tbh, i wouldn't be able to do them at any reasonable profit to make it worthwhile.
if you need a hand give me a shout but your mates will probably sort you with the bits you need
for making a custom shaped enclosure marzmans you man as hes done more with this one than me