I seem to have a hard time finding this stuff in the wasteland
if anyone knows a good source of 15 or so say
and for anyone who cared its for Nuka Chemist and im trying to fill a bat tub with victory and quartz for the hell of it

You can find 2 of each in the store in the reppconn headquarters. Also from various venders.

I recall there were two on the stand behind the cashier at Mojave Outpost.

Hey... What a coincidence!
I was wondering about how few bottles of both Victory and Quartz cola I had
found so far myself, last night. In over 450h into the game,
I collected 4-5 Victory and 7-9 Quartz. The latter is actually quite useful and
was thinking to take the Nuka Chemist perk in the next playthrough.

I know you can find several (4-5) bottles of Quartz in the kitchen at Camp Golf
but have to be stolen, and of course you could check the wiki for more

im looking for regular nuka colas because i want to use them to craft the others because i lost or drank all the others and i currently only have 24 victories and 6 quartz

There's a whole bunch of Nuka-Cola in the Lucky 38's casino, just sat there waiting to be nabbed. I imagine the other casinos might be worth a look, too.