Thank you for the information even though I bungled the model number twice!The 917.271811 comes up with the 532130794 spindles. Rotary makes a heavy duty version of that spindle under PN 15177. Google using "Rotary 15177" and you will sources online or you could go to a local Rotary dealer and have them order them for you.
I did Google that part number and found several sources for Rotary.
I'll post back when they come in to close out this thread.
Thanks again!