Any issues with getting your final out scheduled with the MPF? Especially given the summer months and the short notice? Also, do you actually do your final out prior to starting permissive and terminal leave? Did you turn in your CAC at that time out do you do that later?The only thing you should absolutely need orders for is scheduling your TMO since it needs 30+ days lead time.
There is a memorandum that can be produced called a memo in lieu of orders. I used to see these all the time as the D-Flight commander. The local TMO flight should be able to produce it without any problems.