There are two alternatives as mentioned in another reply you can get a slide sock they are cheaper then the soles about 10.00 and work great or I have found a slide stone it is a 1"x2.5" block of wood with soapstone affixed to it and you rub it on the soles/heels of your shoes it leaves no redidue and is the best slide aid I have ever used,cost 5.00$ and last approx 2 years.
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"Aye Thar Be Monsters Out There"
Ogres,Gryphons,Gargoyles,Centaurs