LG Dishwasher Circulation pump motor dead

For the second time in 7 months, my LG dishwasher has decided to take a hiatus. The first time we needed to replace the drain pump. This time it appears that the circulation pump has gone out on us. The repair shop has told me that I need part #AJH31248604. However, this part looks like it has the drain pump and the motor assembly as well. I don't need a drain pump (as it was replaced 7 months ago) or the assembly either as mine is fine. My question is this, and I'm hoping one of the techs here can answer this for me;

• Do I need to replace everything as the repair shop has stated and buy part #AJH31248604, or can I simply just replace the circulation pump motor (part #4681ED1004B)?

Thanks in advance for your help!