I bought mine from Amazon here in the USA. Looks like you can get them in Canada too.
JT Sprockets JTR245/2.48 48T Steel Rear Sprocket
JT Sprockets JTF1590.13SC 13T Steel Front Sprocket
DID 520VX2-110 X-Ring Chain with Connecting Link
Not 100% sure if 110 link chain is best for you. Gearing Commander online calculator shows that 13/48 with 110 link chain will bring your rear sprocket 5.7 mm forward compared to 13/43 with 108 link chain. This combo is closest to stock sprocket distance, compared to 108 or 112 link chain. (112 link chain with 48T rear sprocket will push your rear sprocket back 10 mm compared to stock.)
Hope this helps!