Bill Northrop is still selling all of the Model Builder plans.

Bill Northrop's Plan Service
2019 Doral Court
Henderson
Nevada
USA 89014-1075

Phone - 702-896-2162
Fax - 702-897-7775
Email - none
Website - none

Hours - Mon-Fri, 10am - 4pm Pacific Time.
Payment by Visa/Mastercard ($US10.00 minimum).

Here's a list of all the Model Builder plans. The Tipo is is under the "RC Sport" category:

http://www.geocities.com/dmlivesay/modelbuilder.html

David