Well, as a matter of fact, Norma just recently created a post here, outlining how to utilize multiple price lists in a single Quotation. I would be wondering if this approach could not get adopted to your needs: https://www.odoo.com/forum/1/278106 (leave your Kudos there, I'm but the mail man)

The correct way to do this in Odoo17 is simply this (in sale order line model)

	​
def _get_pricelist_price(self):
    """Compute the price given by the pricelist for the given line information.

    :return: the product sales price in the order currency (without taxes)
    :rtype: float
    """
    self.ensure_one()
    self.product_id.ensure_one()

    if self.product_id.lst_price is False or self.product_id.lst_price == 0:
        return super()._get_pricelist_price()
    else:
        return self.product_id.lst_price