Where to buy frame parts in the UK for custom frame.

[My First Ebike]

47MM Ø X 1.6 X 200MM HEAD TUBE STOCK — BICYCLE FABRICATION SUPPLY

4130 STEEL 47MM OD DIAMETER HEAD TUBE FOR CUTTING TO LENGTH FOR USE WITH ZS44 AND EC44 HEAD SET COMBOS HEAD TUBE FOR ROAD /TRACK/CROSS/GRAVEL /XC 47MM Ø TO 1.6MM Ø X 200MM 43.8MM ID REQUIRES POST WELD/BRAZE HEAD TUBE REAM THIS HEAD TUBE CAN BE TURNED ON LATHE DOWN TO 46MM FOR LI

www.bikefabsupply.com

I found this website but it's not based in the UK. I'm hoping there is a UK version of this?

73mm T47 Bottom Bracket

Bicycle and cycle frame building components in stainless or mild steel, including dropouts, axles, bolt-through dropouts, brake components - machined in UK

bearframesupplies.co.uk

I found this in the UK but they seem overpriced.

Even a place to buy raw stock at the right diameter to be reamed would be helpful as well.
Thank you in advance for any tips