Rovers are expecting to sell out their entire allocation of tickets for Saturday's game at Barnet by 9:00am on Friday morning.
Just 372 tickets remain from a total of 1,882 after a hectic morning and a steady afternoon of sales throughout Thursday.
Fans began queuing at the crack of dawn, and by the time both club shops opened, lines of supporters stretched back some 100 yards.
The Underhill clash, which takes place at 3:00pm on Saturday, is all-ticket for Rovers supporters.
Tickets will go on sale to Supporters Club members, Young Pirates and Senior Pirates from 8:00am on Friday morning.
Tickets are available from Pirate Leisure at the Memorial Stadium and the Supporters Club shop in Kingswood.
Seats are priced at £16 for adults and £12 for concessions, with terrace tickets costing £15 for adults and £11 for concessions.
There will be no phone sales whatsoever, and there is a strict limit of one ticket per season ticket or membership.
Anyone looking to purchase a ticket must bring their membership card or season ticket with them.
There is virtually no chance of any tickets being available for general sale.
