Where I am at currently it is too costly to ship anything out. Local post office is ridiculous. UPS is over 30 miles one way. And considering I run a one person shop I need to be here all day if possible.
At one time I tried eBay selling and it was a major hassle to get anything shipped out. It bad enough on the inbound USPS packages. A three day priority package can take up to three weeks to get delivered from a vendor that only takes one day UPS. Kinda hoping my parts ordered Monday get here in a week and a half on that three Priority Mail package. The last pacjage I sent out to a vendor sat in Chattanooga post office for a week and that was two months ago.
With this in mind try one you local shops for the parts. They like my shop may keep the parts in stock.