I doubt your going to find one .. At least not anytime soon ... The A standard is the one that is the least adopted out of all of them (a,b,g) ...
I can't believe a school is stupid enough to adopt that as their standard ... If they needed the higher 54Mbps they should have used the G standard that would provide compatability with the b standard ... They way they could have had eveyone covered for their needs ..
http://www.linksys.com/edu/wirelessstandards.asp