I’ll try to find it after work to confirm. I thought the link I posted was the part you neededStill trying to hunt down this part and having difficulty. I know you told us you have a 1998 2x4 Suburban with 4L60E automatic transmission. Can you provide the part number for the bellhousing if you cannot see the part number on the flex plate cover? The part number of the bellhousing is typically on the back of the lump where the starter fits into the bellhousing.
If I can get that, I can probably hunt down the flex plate cover part and determine if it will fit my truck.