I have broken a spoke, almost certainly as a result of a crunchy metal incident on the Fridays' Tour de Normandie. I was about to buy a single replacement, but when I removed the cassette it became apparent that there are five or six others that are sufficiently damaged that they are likely to go ping at any moment. Anyway, I found the identical (Shimano) spokes online, but they are only available as single units at £4 a pop. DT Swiss ones of the same length, however, are £16-£19 for a pack of 18. Can I mix 'em up? the Shimano ones are flat-bladed, and I think the DT ones are round...