The only thing I have ever found was purchasing the Intex replacement hose adapter A w/collar for threaded connection pumps. Unfortunately like everything else supply and demand would have you paying multiple times the MSRP.
You might be able to get away with a 2" fpt adapter LIKE THIS and then adapt it to 1 1/2" slip. I use a 2" MPT adapter to mount my intex hose for my intex pool cleaner with an extra gasket. If you use a decent amount of thread tape I think it's close enough where it will work for you.