We do in fact have a Shopify Experts Directory! You can use it to find local third-party experts are a team of third-party developers who can make custom changes to your store on a contracted basis.
As with all Expert contracts, requirements and prices are agreed upon before any work commences, so you can always check in with a few different Experts to ensure you’re getting what you want for a competitive price.
Me again! Just wanted to follow up by saying that according to SAP’s own support documentation, you would need to be on Shopify Plus to be able to integrate SAP and Shopify correctly. Shopify Plus is aimed at large, established enterprises and is available on a 12-month contract, starting from $2000USD per month.