Here's some ideas for you... I wish I could have found these when my engine blew last july... I spent $1800 on an USED engine with 84,000 miles on it... I would have spent the few hundred extra for a fully rebuilt one like the first one or second one... If you have the know-how... there's also a couple of rebuild kits there too...

$1955

$2350

$3499 (very INTERESTING reading if ya want to know how an engine is remanufactured)

New Crank

and engine kit

if you don't do it yourself:
a rebuild should cost about $500
an engine R&R should cost anywhere from $700 to $1500... in labor
(mine cost me $700)

Hope this helps
(hope all these links work... hehehe)