Bucket seat foam

[bigblock73]

Where would be a good place to purchase new high back bucket seat foam for our trucks? I looked in all the "parts & resto" catalogs I have and have come up empty handed.

Also, the high back Blazer seats are identical to the pickup high back buckets correct (excluding the seat brackets of course)...all the way up to 91??

I need to find new foam for at least one of the buckets I purchased, so any help would be appreciated.

Thanks!