CURL Request Class - urlencode

Hi,
I working with a 3rd Party API and need to configure the URL as per the 3rd party spec.

PHP Code:

$my_row = $client->get('/THIRDPARTY/?filter__Company%20Name__equal=my%20company%20(sports%20department) 


However, CURL Request Class encodes the url to:

Code:

GET /THIRDPARTY/?filter__Company_Name__equal=my+company+%28sports+department%29

Is there a way to instruct the CURL Request Class not to encode the url? 
I can't see anything obvious in the documentation and the only setting I can find in Config->CURLRequest is

PHP Code:

public $shareOptions = true; 


Any help is appreciated