Vacation Taken/Available not correct after employee transfers companies

I'm trying to find out how other companies are handling PDBA history when an employee transfers companies.  In our scenario, when the employee transfers from company A to company B, we want all details on the paystub and payroll register to start back at zero.  In other words, all wages, taxes, and DBA balances reported on their paystub will be for company B only.  However, the one exception is the vacation taken/available line.  The employee should carry over any balances of vacation taken to the new company for their hours only, but not the wages.  I'm familiar with the PDBA