Welcome here!
Regarding your query, first of all decide if you really want the conversion. Conversions are painstaking and time consuming job, and you need to search for a reliable workshop (remember, reliable workshop will be costly). Still the results may not be according to your taste. For the detailed conversion options, visit this link. For first hand information and cost, you can contact Tahir @ G-8, as he is regularly doing such conversions at his workshop. If you want second opinion, contact Faqeer Hussain @ G-10.
If you ask me, I would recommend you to get a nicely converted Cielo instead of all this hassle. You can also contact the above mentioned people for arranging a nice Cielo. You can even get an average Cielo that you can tweak as per your liking.