That's exactly what I've done but I've bought them new from Mcmaster.com.

No good on the second Oring. You'd effectively get half the seal on both. I've never had a leak at the Oring connection before. No worries if you get those surfaces nice and smooth.

I know they're expensive, that's why I had to build my own. The problems with me building cases and selling them is that I don't have the actual cameras in my hand to model the housing and I don't have any way to pressure test prior to shipping. When you get into digital still cameras, you also need to start adding exterior controls for the shutter, etc and you also need to run strobes for flash. It's hard to do-it-yourslef with these requirements. The most I've done for other people so far is to build bare bones housings with no paint or handles. The only requirement is that I know that the camcorder fits inside a 4" pvc tube and what the length is (I always like to leave 1/2" more at the rear in case you go with a long life battery). Email me at mustang100@yahoo.com if you want to discuss it further. Thanks. Bobby

I didn't even know they make 5" PVC. I have seen a few people use 4" but form it around a square/rectangular form by heating it up. I have also seen people make this design using no couplings but heat forming a ring of pipe and stretching it to make the outer collars. I have tried it, but I found using stock couplings MUCH easier. Keep looking for your 5" couplings. You might want to consider a camera upgrade. The new hard drive recording DV cams fit into 3"!!! Bobby