Alternatives to RS775

[noa_n_f]

We were planning on using two Banebots Rs775 with a planetary gearbox reduction of 256:1 to power our single pivot arm. The arm is a little less than five feet long with a light weight manipulator on the end.

However, banebots is out of stock for this gearboxes and even if they had them, the lead time is dangerous.

Are there any alternatives that we could use? Either a different type of gearbox or the use of the other motors in the kit. Would two window motors be powerful enough?

Any other suggestions would be helpful.