Sounds great, hopefully someone will be able to find the item number.
I looked at the box to the regular sized grids and it says it's made by Tricam industries, I bought these at Target. I checked out their website
http://tricam.com but they only talk about ladders they make on there (I guess it's a special order item). I might give them a call tomorrow morning to see if they have anyone else that retails the kids grids or a similar product. I don't want to try purchasing directly because I'd probably have to order 10,000 grids. Maybe I'll be lucky and find out there are other uses for the grids and someone else sells them.
If anyone has the item number to the kids grids please post it.
Thanks for your help.