Didn't think it was possible that Precision could get someone like this to do cyclinder heads for the Mini? Well, we did.
If you don't know who they are or what they do here is a link to an article: http://www.geomagic.com/en/solutions/wegner.php
or just Google them and see who they build engines for.
Here is their web site (though not much information is presented): http://www.wegnerautomotive2.com/ Introductory pricing with free shipping:
$2600 with PSI spring setup and stock cam
$3000 with PSI spring setup and custom profile cam

If our Wegner Engines Stage 2 cylinder head with does not deliver a performance improvement compared to the current head you are running send it back for a full refund within 30 days. Cams must be comparable. Excludes our Stage 3 cylinder head. Excludes shipping and handling chargers.