Exterior Rendering - pebble dash

[Oh Behave]

Have finished a building project and need a new garage pebble dashed plus there are a 2 openings where windows used to be in the existing house so would like to get these filled and matched as closely as possible with the existing pebble dash, plus a few areas where new windows have been installed that need tidying up. The existing pebble dash itself is painted.

Does anyone have any recommendations as struggling to find someone that's doesn't tell me all of the existing render needs to be removed and re-applied except the one guy that said he could do it but is in hospital having both his knees operated on!! I realise to get an exact match on the existing render is probably not possible but the windows are on the side of the house so not that visible. Its not a small job but wouldn't also class it as a big job, probably a weeks worth max.

Located nr Maidenhead.

Thanks

Nigel