Funny you should mention this, I just ordered this one from Actron.  A
close-out for $14.95.
http://www.actron.com/cgi-bin/web_store.cgi?page=cp7676gs.htm&cart_id=6818237
or if that link doesn't work just go to http://actron.com and click on
their garage sale, then look under "test and tune".

Thanks to HMF Stoermer on the Wet Westies list for this tip.
--
Stuart MacMillan
Seattle

'84 Vanagon Westfalia w/2.1
'65 MGB (Daily driver since 1969)
'74 MGB GT (Restoring sloooowly)

Assisting on Restoration (and spending OPM):
'72 MGB GT (Daughter's)
'64 MGB (Son's)

Stripped and gone but their parts live on:
'68 MGB, '73 MGB, '67 MGB GT