3T make 60mm risers (and I have a set for sale if you want to go that way). To get much fore and aft adjustment you have to get separate elbow cup clamps and extension/riser joint clamps, see Nutshell's bike for example.
Actually it seems as though they have 20mm rise on the stem head cap. I don't think it'll be any cleaner. Than my 20mm under a 6deg stem then use Tula bar.
I need a intergrated bar with -16 stem and 0 rise, then I can have 50mm spacers under pads.
3T make 60mm risers (and I have a set for sale if you want to go that way). To get much fore and aft adjustment you have to get separate elbow cup clamps and extension/riser joint clamps, see Nutshell's bike for example.