I’ve got a 15+yo Ryobi 790r string trimmer that needs a new carburetor. Serial # 211D1511727. Item # 41DD790A034. I ordered one off Amazon that fit a 790r but once I received it I could tell it wasn’t right so after some research I realized it was for a newer 790r. Using the item # above I looked up the part number as MTD-753-04229. I found that part on a couple small engine websites but they want $60-$70 for it. I can’t justify spending that on this old trimmer. I can’t find that part number on Amazon or EBay, likely due to age of the trimmer. Any suggestions on where to get one cheaper? Can it be cross-refenced? Thanks in advance.