yup, i contacted acer about this and got a phone number for their spares department in the UK. my computer crashed before the weekend and all my emails are stuck on there at the mo, so i won't be able to give you the details til it's fixed. if you can't wait, or you need info for ordering in another country, i suggest you chuck Acer support an email... they're very helpful
i'll reply here with the phone number once my PC is up and running again, for your reference and for anyone else that wants to order a battery.