Hello Kev 🙂
Just been out to measure the tape to make sure I gave you the correct info. It is a width of 0.5cm. I got it in strips – not in a roll – but I can’t remember how much I ordered. I got it that width and from Moglo. Perhaps they no longer offer pinstripe?
Have had a look for 1/4 inch tape online and it is really hard to find. Readily available from the US but so expensive! If you have the skill, patience and tools to split the 25mm tape evenly then I’d say go for it. It’s certainly a good project to engage in while you await the arrival of your bike.
Sorry I couldn’t be of more help.