Need new speaker for my Glockenklang Uno-cab. Suggestions?

[Kreken]

Anyone has ideas for what would be a good replacement speaker for my Glockenklang Uno 1x15" cab? I have the regular Uno without a tweeter, and it's 8 ohms.

From the Glockenklang site:

Technical Data:
Powerhandling: 300 watts
Impedance: 4 or 8 ohms
Sensitivity: 98 dB/1 w/1 m
Frequency range: 36 Hz - 3,5 KHz
Dimensions HxWxD: 510 x 595 x 435 mm
(21" x 24.5" x 17.1")

Thanks!!

[Kreken]

The original speaker(now blown) is a Volt Ps15/250. I'm having a hard time finding a place to buy that one(it's on Volt's web page, but haven't found it anywhere else), so I'm looking for options. Anyone?

Thanks!

[Matthijs]

The Volt website lists a distributor in Sweden