Italeri Steyr Truck Question

I got hold of an Italeri Steyr Semi in 1/24 (see below) and was looking to convert/ modify it from a single drive to a double bogie setup. Of course this thing being 1/24 scale and a Euro truck, I can't simply use a axle and suspension set up from a current issue AMT Peterbilt or Revell Kenworth. Anyone have any ideas (besides buying another full Italeri kit to be used for parts) for me to accomplish this? There doesn't seem to be anyone selling parts and pieces to Italeri Euro trucks on ebay, which makes it a bit hard to get this project started.

I'm not looking for this truck to be 100% accurate since I am going to modify it to be more of a heavy/ long distance hauler with a stretched chassis, extra fuel tanks etc. But in order to do this it really needs another drive axle at least.

Any suggestions would be appreciated.

Cheers.

dunno if this one is any good, take a look
http://www.auslowe.com.au/index.php?option=com_virtuemart&page=shop.browse&category_id=67&Itemid=27

KFS might do a bogie drive set up that you could use, Beary Crafty used one on her GRM Volvo but it might be pricey.

Thanks for the ideas, the one from Auslowe might work. I'll check out what the Steyr's suspension looks like...if they match close enough, I may get away with that.
Thanks again.