There is no good way keep from loosing detials when filling seams. You may have to replace some of the rivets. Archer has rivet sets, or just be carefull and try not to lose too much. I built the Huskie a long time ago and if I remember correctly, if you are careful, you can seal it up without having to fill and sand, etc. since most of the seams are along natural joint lines.
For pilots, there aren't really any civil sets, nor 1/32 sets. You can easily convert military pilots by painting their flight suits blue, orange, or some other not-so military a color. You can also paint the survival vests brown or someting to look like a civilian vest. Here is a thread that lists most of the 1/35th helo pilot sets out there. It isn't an issue using the 1/35 pilots, the scales are close enough to not matter.
If you are interested, Cobra Company does a really nice interior set for the H-43. You can check it out here.
Good luck.
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