cracked sky light pane

Hi  Have just been cleaning my Autosleeper Nuevo 2002 model via ladders.  Sadly whilst doing so I have noticed a rather large crack in the opaque cover, have just checked with autosleeper spares and they only sell the whole unit for about £80.   Does anyone have any suggestions ?   Most grateful Mags

I'm assuming by the 'opaque' that this is the smaller rooflight 400mm x 400mm.

These are available from any caravan dealer and also on Ebay. They are available as a complete unit with flyscreen and blind and depending on the make, you can get just the dome. Here is an example of an MPK one. Search Ebay for rooflight and skylight to find an exact match or visit your local caravan shop armed with yours to match.

http://www.ebay.co.uk/itm/MPK-400-X-400-ROOFLIGHT-VENT-WITH-BLIND-FLYNET-CARAVAN-WHITE-40CMS-X-40CMS-BN-/161199435311?pt=UK_Campervan_Caravan_Accessories&hash=item25883c2e2f