Need Ability to Print Customer Info on Dolibarr Receipt Printer

I use the native Dolibarr Receipt Printer module for printing receipts from TakePOS and while I have been able to fix a whole variety of formatting issues and whatnot through hand editing dolreceiptprinter.class.php, I cannot figure out how to have the name of the customer (llx_societe.nom) selected in TakePOS to print on the receipt. The {dol_value_cutomer_firstname} and {dol_value_customer_lastname} fields are not useful.

To be clear: I want a new field that I can use in Dolibarr Receipt Printer templates: {dol_value_customer_entity}. This value would be equal to the value stored in llx_societe.nom for the customer selected in the TakePOS interface at the cashier desk.

Can someone resolve this for me?

Thank you!