That’s what I made. I bought my Raleigh Pro in October of 2013 and did its frame up overhaul over the winter of 2013 - 2014 so I had lots of time. When it came to top tube housing clamps and bottle cage clamps, I just made them in the shop. Cut up a piece of stainless steel, bent tabs and drilled holes. SS hardware and “bob’s your uncle”. They’ve worked very well since then and look right for the era. Easy.

”way back machine”: I spent a lot of time wondering what straps to make/buy then happen to visit Browns of Beverly on Cabot St in Beverly, MA. Saw an early 70’s Raleigh 3 spd there with plain bright steel straps. “That’s what I’ll do.” Browns is long gone now. Sad.