Import/Upload Supplier Pricing for Quotations and/or Blanket Purchase Orders

If anyone has setup a process to import or upload supplier pricing to create
quotations and/or blankets would you have any documents that can be shared.

We have pricing that can change monthly and testing in Quotations and
Blankets the individual org, timeframe, and price could be setup in order to
default the correct price on a purchase order based on the need by date to
eliminate a manual labor intensive process.

EDI form 832 through the xml gateway, scripts to create quotes and/or
blankets, and manually uploading tab delimited files were all possibilities
but if one of these, or, some other process was used we could use any