Use any lever thats larger than your bullhorn's diameter, and then a shim/spacer.
If you send dimensions I'll make one for you. See on my "going out to drink aperol spritz in London Fields" bike:
Drop me a message if you need one made. If you'll be using 31.8mm oversized ones, I could make it eccentric so it has space to guide the cable of the shifter too.
Use any lever thats larger than your bullhorn's diameter, and then a shim/spacer.
If you send dimensions I'll make one for you. See on my "going out to drink aperol spritz in London Fields" bike:
Drop me a message if you need one made. If you'll be using 31.8mm oversized ones, I could make it eccentric so it has space to guide the cable of the shifter too.