@Stephen *******
no you could not, you mis understand how a re-entry permit works on a single entry tourist visa 🙁
here lets use DATES
you enter on Jun 1 and are stamped in to Aug 1 (let's say for easy counting)
You BUY a re-entry permit, IT will be valid until AUG 1, if you exit the country and come back you will get stamped in ONLY until Aug 1
A re-entry permit DOES NOT ADD time to your stamp or give you a new entry it just keeps the original entry stamp 'alive' so if you come back before that date you get stamped in until that date