Genelec 1092A with broken drivers

[Solve]

A friend of mine bought an Genelec 1092A with broken drivers cheap but the price for the drivers is $600 at Genelec.
Way to much!
Its two 8" Peerless 831483 and could be an special made for Genelec.
Cant found it on the net.
So, how to guess an substitute?

Genelec 1092A
Technical Specifications
Free field frequency response ( ±2.5dB): 33 - 80 Hz
Maximum short term sine wave
acoustic output in half space,
averaged from 35 Hz to 85 Hz @ 1m: > 115 dB SPL
Self generated noise level in
free field @ 1m on axis (A-weighted): < 10 dB
Harmonic distortion at 100 dB SPL @ 1m
on axis in half space (30-100 Hz): < 4%
Driver: 2 x 210 mm (2 x 8")
Weight: 30 kg (66 lbs)
Dimensions:
Height
Width
Depth 615 mm (24 3/16")
320 mm (12 5/8")
510 mm (20 1/16")

AMPLIFIER

Amplifier output power
(Long term output power is limited
by driver unit protection circuitry): 180 W (4 Ohm)
Amplifier system distortion at nominal output: THD < 0.08%
SMPTE-IM < 0.08%
CCIF-IM < 0.08%
DIM 100 < 0.08%
Signal to Noise ratio, referred to full output: > 100 dB
Mains voltage: 100/200V or 115/230V
Power consumption (average): Idle 50 VA
Full output 300 VA

FILTER

Subsonic filter (18 dB/octave) below: 33 Hz
Crossover frequency (sub/main monitors): 85 Hz
Crossover frequency (sub input channel): full band/85 Hz
Crossover acoustical slope
Lowpass:
Highpass: 28 dB/octave
12 dB/octave
Midband rejection, frequencies > 400 Hz: > 50 dB
Bass roll-off control operating range
in 2 dB steps: from 0 to -6 dB @ 33 Hz
Phase matching control in 90° steps: from 0° to -270° @ 85 Hz

All data subject to change without prior notice