PT has only released few 747s and DC-10s and 767s so far.
and depending on the configurations, whether a baseline model like 767 is somewhat around NG's price point (320+CNY), or a heavily modded 747s like SCA would cost much more (480+CNY). despite that first model KC-33 is really cheap (250+CNY) but only limited 150pcs. since then the price has gone up quite a bit.
in terms of the IIAF duo set, it's the 2025HEC(Hobby Expo China) limited edition which means you cannot order online through retailer on Taobao, only able to buy onsite and the admission ticket is around 100CNY, and you have to queue early for it (daily ~50pcs limited) to be able to buy at retail of 690CNY (set) which I consider is already quite a bargain. the total number is limited to 350 sets and rumor says only 150 units are for CN market and the rest can go to overseas retailers like MHH so definitely stay alert for their email updates.
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@abdulmohiuddin has said PT is likely to release another IIAF 747 tanker (5-8103 perhaps?) as individual model but until further announcement there is no more details.