We could just have PGF made into a permanent drop, weekly/weekend event type of drop and/or make it redeemable for a reasonable amount of DTs. Was it not $60 when it was available for redemption before? People with the time and the ambition could hunt them while people with less time and/or loads of money to spend could still fork over large amounts of $$ for DTs to buy them. It is a permanent drop on other private servers (and was at the end of the Japanese server's life) so why not here?
If you don't think it plausible make PGF cheaper, more accessible, or to make DM & DF more balanced then maybe buff some other weapons. This could be done by either increasing atp on certain weapons or reducing atp while combo unlocking certain weapons. How about a Female equivalent to Psycho Raven? Maybe a Banana Cannon/Iron Faust equivalent combo unlocked launcher for Ramarl & Ramar. An example of this is to either buff the atp on Cannon Rouge and keep it combo locked or reduce its atp by a couple hundred and combo unlock it. Other examples of bazookas that could use a combo unlock and possible atp adjustments are Gi-Gue Bazooka, Ano Bazooka or NUG2000-Bazooka. You don't need to hit for 1k per shot (even though 100% Banana Cannon crits over 1,100... on Fomarl) but it would be nice to have a combo unlocked bazooka for Ramarl/Ramar that can easily do 600+ per target hit like Forces and Racast/Racaseal can do with junk stat Banana Cannons or Iron Fausts. None of these ideas come close to the power of DM but it would make all Ranger and Force classes a little more balanced without god tier weapons. Heck, an easier to find piercing shotgun like DM would be nice even if it has half the atp.
However, it would take a ton of work trying to balance all those weapons compared to just making PGF a permanent drop and/or fairly priced for DT redemption. That would stabilize prices and satisfy disgruntled players that are unlucky every time the event comes around. Prices for it would most likely go down but having more PGF/DM/DF in circulation = more being traded for and bought, which leads to more DTs being purchased in order trade for and buy them. Not to mention more DTs being purchased so that people can sphere their shiny new DMs & DFs. Just my thoughts on the matter and I'm sure people will try to poke holes in these suggestions but I'm just thinking for the good of the community in the long term.