Vendor list by "account"

Try to run a report by Purchases By Detail and include both the Source Name and Name in the report. One of those fields is the vendor and the other is the job. You should be able to filter by vendor and I recommend running it for all jobs and then export it into an excel sheet and go from there.

If you buy materials for a job, have each vendor sell to you by the job name on each invoice. This is particularly important if you are purchasing from one vendor for more than one job. You should be filing invoices paid under that job file and you can also run a report of materials for each job by vendor. Good luck.