Product review (5 stars): DYI save yourself money on this washer repair
Our Whirlpool washer has the number WFW9050XW00, as shown in the attached photo. Sears.com recommended PART NUMBER: W10290499 for the bellow, but gives the following substitution: W10381562, found here on Amazon. I installed the bellow or washer door boot myself, and it fits perfectly. This was a great price compared to Sears. I elected not to buy a replacement spring clamp, as mine were in good condition, and reusable.

The install took me longer than the 1 1/2 hours I anticipated as a minimum. The majority of the overtime was because of forgetting to reconnect the control panel inside, before reassembling--in hindsight it was probably not necessary to disconnect that, though the video instructs you to do so. The following youtube video gave me the general idea of how to do the install: https://www.youtube.com/watch?v=EFDqUvBgxH4  It was not the exact same model, but the same basic steps. I have my washer and dryer stacked, which added to the time and heavy lifting to unstack and complete the job. If yours are not stacked, it might be a lot faster than it was for me. The hardest part for me was to reconnect the outermost spring clamp onto the below. I don't know if there was some trick I'm missing out on, but it took two of us to get the clamp on. What helped us pop the clamp back on was to use plastic tire levers, that you use for changing a bike inner tube, to put it back on. All the other steps were simple removal of screws and parts--pretty simple assembly and disassembly.

The part was exactly what I needed; the process was slightly more frustrating than anticipated, but the satisfaction level of completing it yourself and saving big $$ was very high. Consider my description above and watch the video, if you decide this is a job for you to do yourself. Aside from the lifting, and 2nd spring clamp attachment, the rest was a one person job.