The B’mann 24mm ones fit nicely, but the coupler height has dropped by 4mm (32 - 24 )/2. There is a 4mm rectangular ‘lump’ which looks like it was added to enable 32mm wheelsets. Remove this lump, and trim down the remaining part of the coupler mount. The coupling is now back at the correct height.
I posted a while back a picture of two wagons on HLW chassis, one with 32mm wheels, one with 24mm, all sets B,Mann metal.
Malcolm