Where do people in Glasgow buy decent car detailing products locally?

I’m really into car detailing and one thing that’s always frustrated me is how little choice there seems to be locally around Glasgow.
If I need something the same day, it often feels like the main option is Halfords. Fine for some stuff, but if you use brands like Bilt Hamber, GYEON, Gtechniq, CARPRO, Garage Therapy, Koch-Chemie, IK etc., I normally end up ordering online and waiting for delivery, sometimes from several different retailers.

Am I missing somewhere decent locally?

Also curious whether other people into detailing around Glasgow feel the same way. If there was a proper specialist shop carrying those sorts of brands at competitive prices, would you actually use it rather than just ordering online?

Would you be more interested in:
• a physical shop you could browse
• click & collect
• same-day/local delivery
• or are you perfectly happy buying everything online?

And what brands/products would you actually want somewhere like that to stock?