You never heard this from me but Harbor Freight has one for about $69. It's good enough for the casual use we require.

http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=97706

Hmm, seems as though the price went up to $89. I must have got mine on sale, err, I mean, that friend of mine got HIS on sale.

Have you checked with Autozoo or any of those places? They usually have a "loaner" set.