I tried buying circline tubes online but most are sold as singular. I can find 22w, 32w and 40w tubes from different brands but no matching sets.

For example: I recently bought 22w and 32w circline tubes from the same brand, one from a store and one online. I couldnt find them as a set anywhere.

I remember about a decade back circlines were sold in stores as a matching replacement set of 22w and 32w. But now I can't find any sets. I really want matching sets of circlines.
Were circlines always sold individually?

In Canada and probably North America in general I remember they were always sold individually. The only times I've seen circlines packaged as a set were the lamps that were included in some fixtures.

Circlines are sold as a set of 2 or 3 in Japan. I brought home a box of 2 in 6500K, made by Panasonic.