Our sales team has several standardized line item sections / groups that they would like to be able to apply to a single quotation.  However, a quotation can only have 1 template.  If you apply a second template it overwrites the previously applied template.

What they need is:

1.  Start a new sales 
2. Add template line items for A.  This applies all of the line items in template A to the quote
3. Add template line items for B.  This applies all of the line items in template B to quote.
4. Add template line items for C.  This applies all of the line items in template C to quote.
5. Etc...

At this point the quote would consist of all of the line items from A, B, and C.

Does anyone know of an existing module for that?