Not that it's a huge sample size, but adding to what MiamiHockey provided, UBC -a bottom tier CIS team- lost 3-1 to the AHL Abbotsford Heat back in 2011. In 2010, they lost to the ECHL Victoria Salmon Kings 8-6.
The Bisons had several games against the Manitoba Moose (AHL):
September 2002: Moose 7 Bisons 3
September 29, 2005: Bisons 3 Moose 1
October 4, 2005: Moose 6 Bisons 4
September 26, 2007: Moose 7 Bisons 1
September 30, 2008: Bisons 6, Moose 2
September 29, 2010: Moose 2, Bisons 1
Some, like the 2010 game, were billed as "Moose Prospects". In all cases, most of the key AHL players were still at the NHL camp at the time. The 2005 games were very close to a full Moose roster and those were pretty much the only exhibitions they had that year.
Most CIS regulars could play ECHL no problem. In fact, many are AHL calibre but don't sign there because they are too old to be "prospects".
The Monkeys play the Oilers Prospects most seasons and have a winning record.
In a Battle of Calgary, the Flames have beaten the Dinos twice now, I believe. Maybe MRU will get in on that now.
Sask played the Islanders Prospects I believe in a Saskatoon prospect tournament one year as well.
The Bisons also played a mini-tournament against "Jets Blue" and "Jets White" in 1984. Those were mismatches. Dale Hawerchuk and those guys played in those games. The Bisons had Dale Derkatch then. He won the WHL scoring titles back-to-back but he was barely 5 feet tall. He left the Bisons after just a few games to play in Europe.