Realtyna RPL Map Google API Bug Fix

We have a Joomla website using Realtyna Property listing (RPL) and OSE Membership (subscription) modules. We need a developer with working experience of Realtyna & OSE, as well as Joomla, PHP. We have had various customisation work already done by other developers, who almost at the end of the project, have now let us down. Therefore we now have a very tight deadline. The last remaining items are: 1) Realtyna's integration with the Google map API - when locations are entered into our search facility to default to UK (unless other countries are specifically requested) 2) Amendments to the map's Radius search facility - for the searched mileage to display outside of the radius circle.