Where I see diverse assortments of citrus here including less generally familiar types is at large independent garden centers.
Believe it or not I saw some in the Home Depots last year - the Richmond store had a shipment of patio citrus and I saw at least 2 pots of finger lime, and I believe I also saw a couple at the store on Henning in Burnaby.
Are you still looking? - I see Phoenix Perennials in Richmond has them listed on their "incredible edibles" available list.
I know that Brugmensia-Québec has some and ships too. He has an internet site and a FB page. I did buy from him and had no problems. Floraexotica has some too and is reliable too.
Well popped into phoenix perennials today and picked up a finger lime and a saduchi. I was also super pleased to grab one of the new pixie grapes that they had in stock.
Congrats on getting your lime Pixie's are fun - I picked up one 3 years ago from RC Superstore of all places. Still in a 2 gallon pot and only about 1.5ft tall.......and produces grapes each year :)