Ye that would be me in teh Soarer
If you can pull the motor out yourself with the help of a few mates you will save yourself a metric butt load of money.
You have a fair budget for it, so providing you can get the motor out you will get a reasonable RB26 for $7k, if the pistons and rods are re-useable you will have change left over.
I suggest you go and speak to Greg at pro-engines in Queanbe-hole
http://www.proengines.com.au/packages.html