KCAD have both experience and a number of rigs in Nigeria of varying horsepower: 750, 1500 & 3000. (T43, T57 & T80a)
Thanks to DT for flagging this as I'm currently on a different planet!!! Dave can you please provide my contact details to Roman and I will put you in touch with the in-country team so you can talk about experience, etc..
Note from DT: Done!