Nitrous plumbing A1A...??..

It looks like I should have all my fittings and some new an lines coming later today. It doesn't look like my nitrous plates will be here till Tuesday...
Since I have an auxiliary fuel pump and regulator right now I would really like to get my little fuel tank.. there's a lot of options like little snowmobile tanks or little mini bike tanks or even lawn mower tanks.. I'm really looking for something I can set up on top of the will well that's not going to be big and intrusive.. also if I can't get it in a white plastic that I can see through I would at least like a sight window of some sort... One of the other problems is finding one with enough connections. Obviously most of them have a petcock on the bottom but I would also like somewhere to connect in an overflow to back circulate and also a breather tube is well. I would prefer not having a breather in the cap and having it slush around and spill out... This little tank isn't as easy as I thought it would be to find that's going to fit the bill..
All of this I would like to do soon as I would be able to pressure check with the nitrous plants outside the car and not have to worry about flooding it..