OK
Iv done this before , maybe it will be more to your liking
The easiest solution was to collect the damn stuff, and since I had been continuing plants for so long with water cloning, I decided to try and stick several entire male branches in water, just before they released most of they're load.
It worked better than I could have possibly expected. The males were long enough that they hung over a glass on an angle enough to keep the droppings on the (freshly cleaned) glass and out of the water. Over the couse of five days, they left at least a full gram on the glass, along with the remains of male flower petals(?)
Finally, I collected the pollen up and mixed it 10:1 with plain white kitchen flour for fridge storage