A friend of mine told me about a new PBY museum up on Whidbey Island. I haven't been there yet, but the website has some good pictures and it appears to have some great displays, like an eyeball turret! Their Facebook page is also excellent. I found some interior shots of PBMs and PBYs along with a few other gem details.
Another good reference site and it certainly appears to be worth a visit.
PBY Memorial Foundation http://pbymf.org/
Cheers,
Rob