sallybear
The place you are thinking of is Asklipios Tours.
http://www.asklipiostours.com
We have used them on a number of occasions and always found them helpful and cheaper than the reps. They cover trips to Kalymnos, Nissyros, Turkey, Kos by Night, Kos by Day, Sunset in Zia, Greek Night and even a Hydrofoil trip over to Rhodes. I don't have up to date prices, but June of last year they were as follows;
Kalymnos Monday 25 Euro.
Rhodes Monday 45 euro.
Greek Night Sunday 25 Euro.
Turkey Tuesday & Friday 35 Euro + 9 Euro port tax.
Sunset in Zia Wednesday 10 Euro.
Kos by Night Friday 10 Euro.
Kos Town (day time) Tues. Thurs. & Friday 7 Euro.
Nissyros Tues. Thurs. Friday & Sat. 16 Euro + 7 Euro for bus to the volcano.
Water Park Sunday 20 Euro.
Pop along and speak to Joyce, but have look at the web sight as they were offering a 10% discount for booking on-line via e-mail.
Say hi to Joyce from me if you see her.
Hope this helps.
Andy.