Auto Numbering of PO's

 My client is going live on PeopleSoft 9.1 with ePro and Purchasing.  They want to have auto numbering turned on at the Business Unit level with a starting sequence my business Unit.  The Business Units are 3 characters but alphanumeric.  Is there a way to prefix the Business Unit?  For example they want a PO ID to be ABC0000001, BCD000000001.  The reason they want this is because on the Invoice's from the Vendors they only have the PO ID and the AP Clerks need to seach by that ID within a BU.

Another issue with auto numbering is if they cannot add the bu in the number they would want to set a value to reflect the BU such 01 would mean BU ABC and 02 would be for BU BCD  example 0100000001, 0200000001 .....  They also would like to add the Fiscal year to the Prefix and change it every year at year end in July.  For example 0111000001, 0211000001 then next July the auto numbering would restart at 0112000001, 0212000001.