To be honest, the chances of finding a pair of 105 levers with hoods already on them is probably your best bet. I had the same situation and bought a pair of levers with hoods on EBAY for $12.
Here's a link for hoods but depends how much you're willing to pay.
http://cgi.ebay.com/New-Old-Stock-Sh...QQcmdZViewItem
http://cgi.ebay.com/New-Old-Stock-Sh...QQcmdZViewItem
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