The Pilgrims are scheduled to visit York Road on Monday May 5 (kick-off 3.00pm) – in a potentially crucial National League fixture.
The home club have increased the Pilgrims' allocation by 100 tickets to 800 in total – but this is likely to be the final number.
Supporters intending to head to Berkshire are therefore advised to purchase as soon as possible.
An earlier glitch involving the unavailability of adult tickets in the away end has now been fixed.
PIC: Chris Bray.