Chevy & GMC Vans

I haven't had any luck finding the sliding door weatherstrip replacement for a 1999. Does anyone know the part number? Has anyone had any luck with the "universal fit" weatherstripping for the sliding door?

This product: https://www.summitracing.com/parts/shi- ... /overview/
sounds good but the part numbers it references look like they are for a Savana/Full size van

This is what Rockauto offers: http://www.rockauto.com/en/moreinfo.php ... 12&jsn=249
Which just seems to be a universal fit product, at half the price.

Any ideas?