Well... you could buy a few GSO super plossls, $29 from Andrews, halfway down the Guang Shen page
http://www.andrewscom.com.au/site-section-10.htm
Or if you want something a tad better quality, the Vixen super plossls at about $50-$70
http://www.myastroshop.com.au/products/vixen-ep.asp
or the TeleVue plossls from Bintel which cost a tad more and are basically the same thing.
The next step up are the Vixen NLV's see also
http://www.myastroshop.com.au/products/vixen-ep.asp - excellent midrange eyepieces and the range goes down to 2.5mm, but they're well over your budget.