for the most part, they are not a universal in size, though some o-rings will be the same to many models, others will not, so finding something with them all in it is the issue.
These are the o-ring sizes you need, remember these are a silicone o-rings, and the nitro fuel will eat nitrile and most other o-rings.
might be able to find a kit that has most of these sizes in them
1: 15235 O-RING 22.0x0.9mm
2 : 15270 O-RING 11.5x1.25mm
2 : 15278 O-RING 2.0x1.5mm
3 : 15279 O-RING 2.0x1.7mm
1 : 15284 O-RING 2.0x1.0mm
HPI#15241 is the complete kit of these o-rings, but the K4.6 has been discontinued for quite some time, and a bit more scarce, the F4.6 has a few that might work, but for the most part are different.