Erm... you can just order Bromo through the internet legally, and it's coming from Canada btw. I got a few batches Bromo and they are just smaller than those of acid, not squares, but circles. Although it may be possible that someone just uses acid blotters since everyone can order Bromo.
But if you order Bromo in bulk, an acquaintance of mine did, you'll get it in a seal as the pure substance labeled with 'may be fatal if ingested'. Fuck knows who makes papers out it.
The guy who sold the batches to me, sucked on them himself and said that they 'burned' on his tongue for hours. He tripped over 30 hours at Boom!. Also, on a Dutch forum people report that there's definitely a distinguishing in the LSD and Bromo experience. Bromo is much milder and much more swinging than the straight clear experience of LSD. Most of them have just seen it after a while so it's not the unique impact of acid. Most people compare the intensity with the effects of 2CB. Just very long-lasting. People usually get tired or bored after 15 hours while the effects may go on for another 10 hours and it wears off very gradually. You might recognise it.
Before ordering those 100, what about buying one and sucked 1/8 or 1/6 of a blotter? If people are ripped off with acid, it's often just low dose acid or blank blotters.