http://www.maliburacing.com/forum/viewtopic.php?f=29&t=81540
thats my thread and pictures are there as well
These guys could probably help you with a custom kit:
http://www.spectreperformance.com
The one I ordered off of ebay, and yeah, probably would have been cheaper to build one from autozone or advanced auto:
http://cgi.ebay.com/ebaymotors/99-00-01-02-03-04-05-06-Silverado-1500-2500-Air-Intake_W0QQcmdZViewItemQQ_trksidZp4634Q2ec0Q2em14Q2el1262QQhashZitem200332144101QQitemZ200332144101QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories
I just used the stock MAF and put it in there, you can see the pics