Where do you go for reliable multiples (Canadian SMB)

Hi folks.
I have analyzed some public M&A transaction data and different websites that specifically report on Canadian SMBs to land on reliable multiples of EBITDA to share with my Owner/Operator clients so they can more accurately value their business prior to any diligence with a potential buyer.

What resources / databases do you rely on to land on reasonable multiples of SMBs (specifically ones for sale in Canada)?

Merci beaucoup.
Steph