Price get in pricelist price_get call with context

in price_get of product.pricelist, ther is a call of product.price_get.
Is it possible to add in parameter of this call the context (which is declare in product.price_get) ?
That permit, when call form order_line or purchase_line to have the date of purchase.
it's because i have to add historical price on some product (not all) without formula and so use of pricelist is difficult.
my wish :
just add line 233-234 of pricelist.py argument context=context in price_get call :
product_obj.price_get(cr, uid, [prod_id],
       price_type.field,context=context)[prod_id], round=False, context=context)