You could likely be able to repair that part yourself if you can take that piece off and get the model number, you could probably get the replacement part and install it yourself.
I'd suggest getting the part even if your uncomfortable with replacing it yourself before contacting a HVAC tech that would have to do the same but have charged you for showing up just to get the model to order the part and then coming back in however long to install it. I've done replacements like that before and it's not hard, but I stay away from dealing with replacing any of the like "gas line" parts for obvious reasons.