@timothy lacasse Well, if its just more Grognard bodies, believe it or not you can already do that more or less without getting a 3D printer yourself or using blue stuff recast mold, in two way in fact:
First option is plastic bit part re-sellers, and I know there is/was at least one on ebay selling individual official WA grognard bodies by themselves for a fairly good price, even the heavy team ones (Toil and Trouble Hobbies).
Second option while a bit more pricey is to buy a set of 3rd party heroic sculpted French great coat leg (which are common enough to elicit expletives) and then use an armored torso (even more common and yes you can even use old plastic cadian torsos).
For the Second option, currently the best stable deal in the US is probably Hoplite Miniatures' ebay store which sells Reptile Overlords French coat legs at 10 legs for $12, they have Reptile Overlords Pareto Legionnaire armored torsos that would work perfect for grogs also at $12 for 10 parts, for the same price they even have matching French style coat upper torsos as an alternative torso option if you want some unarmored light infantry to go with the grogs you have, all their orders come with bases and they are currently having a sale so everything 10 for $10.
Great coat legs are as mentioned really common so you might be able to do it even cheaper. I actually have some Maxi mini metal great coat legs I got in good sale off ebay that I have since decided to use to make some “Damned Grognards” since I also have some resin torsos also off ebay that would work great for that and not counting the arms which will mostly be WA I am pretty sure it costs me about $20 to $24 for 24 bodies (just need to sit down and do it).
Now that all said, I noticed you mentioned "setting bodies for making pilots" in the first post, for that depending on what they are driving you may not need or really want great coat bodies since tankers often dress diffrently from infantry, so if its walkers or power amor you can get away with using old GW Sentinal pilot bodies with grog heads, the only place it might be diffrent is if we are talking things like jeep type vehicles and even there you can have the sitting driver dressed diffrently from the standing gunner.