Brian's Surgery Fundraiser

This week our beloved Brian started showing some very troubling symptoms - first it was blood in his pee, and then he became completely blocked. We took him to the vet immediately. He was hospitalized, they would do all the tests, catheterize & flush him. The first day we took him home he was blocked again. And that's what is basically happening for three days in a row now - Brian spending his whole day (and even one night) at the clinic with catheter, then being blocked again each time we take him home. PU surgery seems like the only option left.
We've already spent 2000 $CA, and the surgery will be another 1800 (excluding tax), and we are devastated.
We love hom so much, we hardly had any sleep this week, trying to monitor his every trip to the litter box, hoping he'd finally unblock. No luck(
We would very much appreciate any help, sharing&reposting included.

Please help our lovely Brian! His younger pal Chris is waiting for him to finally come home and play.