There should be lots of used ones about if you don't mind cleaning one up that would serve the purpose for a while. If you aren't concerned with concours you could always upgrade to the GM three speed motor which really puts out the air as well. That mod is covered at http://www.mgexperience.net/phorum/read.php?1,519704
'73 Midget (V6)
'59 MGA (I6) under construction
'73 Lotus Europa
'52 MG TD kit car body project.
'98 Jag XK8
"There is a fine line between a hobby and mental illness"