Hi Dan,
I went with an easy bypass-filter solution:
http://www.microgreenfilter.com/
I'm sure it doesn't offer the same level of bypass filtration as a dedicated setup, but it's also a very easy install.

The cost is quite reasonable, at less than $50 shipped for two. I planned to do some UOA (used oil analysis) in about 15k miles, but I've since sold the CRD to a buddy of mine. If the UOA indicates that an extended drain interval is allowable, the cost savings of the oil will actually save money over conventional filtration.
I'd buy this filter and use the money saved to buy a tune.
- Chris