I want these gone.
If you can find them they seem to be around $AU100.00 + for a single motor.
They may also suit the HEQ5 by swapping the mounting plate however it is your responsibility to verify this.
http://www.ebay.com.au/itm/311553834000?rmvSB=true
DEC Motor: Synta Model 52BYJ08 Voltage 12VDC DW 1323009 Step Angle 3.75°/7.5° Ratio 1:131.876
RA Motor: Synta Model 42BYJ05 Voltage 12VDC DW 1323006 Step Angle 3.75°/7.5° Ratio 1:131.876
Now $145.00 + $10.00 towards postage.