Old plastic guard arms or proxies

I have quite a few older imperial guard models. They originally came with plastic arms, the ones with pockets at the shoulder. I have since used up, or lost, my extras. Does anyone know where to get more? I've looked on eBay, but they are understandably rare/not there/not affordable. I know that tons of older lead models are resold without their plastic components (arms mostly), so arms must be in high demand. I find that the new plastic guard arms are a bit too big. Does anyone know of a company who sells appropriately sized replacements? Thanks

You might want to check out Victoria Miniatures. I've read that the resin arm sets scale pretty well with the old metal guard, due to not having the bulky shoulder pads of the current GW plastics.
http://victoriaminiatures.highwire.com/

Thanks, I'll have a look over there.