I found Lowe's in Ogdensburg sell these cables.
I found cables, both pre made and bare, in 25', 50' and 100' lengths.
They also have an assortment of connectors too.
I know Ogdensburg is not handy for Ottawa folks, but, just in case you are willing to travel.
Is CAT5 an option? You get a bonus pair for future upgrades. Although I will admit it's a bit bulkier.
CAT 5 is no good, it has the wrong connector.
My bad, I missed the part where you said "pre-made". I though it was used for custom wiring.