Update of my own: as stated on http://www.nitro-solv.com/, it appears "the industry" is under attack and all they can accept is e-check and money orders. Jenray.com has also been updated and they only accept money orders. So it appears for the time being all US-based suppliers have no way of electronically charging us.
Another warning!!
The day after I started this thread, I placed an order at an oversea supplier at http://liquidaromapower.com/. I spent 60 US dollars and just over 2 weeks later, they arrived. BUT, they are all bunk. It's the same diluted fluid in every bottle. The items I ordered (Rush, Man Scent, JJ Platinum, Hardware, and Amsterdam) were all fakes. I suspected something was up when it was damn near impossible to open them, and the wrapper left a sticky residue all over the bottle. I assume this is because the folks there had a less-than-perfect way of applying the fake wrappers. So, steer clear of them. I am typically not one to bash others, but I can promise you $60 later and 5 "new" bottles later, I learned my lesson and wanted to share with you guys who are probably crawling the net searching like I was. Also, other overseas suppliers funnel their site to http://liquidaromapower.com/, so make sure you check your browser before purchasing.
Not sure if local places can still sell them (or charge your card I guess), but I am headed to a somewhat-local theater next week that has sold them in the past, and I will report back.