1/8th scale epoxy fiberglass cowling  part# SG630C will fit the following hull:

RCBoatCompany Part#     Master Hull#      Year           U#         Unlimited Hydroplane Name
SG630C                        8025                  1980-82      U-25       Pay-n-Pak

Cowling measures 30” L  x  5”  W  3-1/4” H
Please specify if you are building 1982 Pay-n-Pak. I will include the extra pieces.    
Price.....................................................   $85.00 plus shipping