Build An ASP.NET Master Page Template

We regularly need to provide an asp.net master page design to our clients' with the same appearance as their primary website. The design we provide has the same top area, bottom area, fonts, menu, colors and styles in order to provide them with a sister site running asp.net. The design will be delivered to us as an asp.net web forms master page using bootstrap for responsive formatting and will be used by the client to mirror the design of their existing site and allow us to provide them with additional functionality via the asp.net site. The existing site usually uses a WordPress template, and it may use bootstrap or any other framework. The asp.net master page and asset files that you deliver needs to only hold the site design (top area, bottom area, fonts, menu, colors, styles) - no other special coding is required on the master page other than content placeholders. The next page that we need to do this with is [login to view URL] and the product that you deliver will look similar to the attached image. While this job is specifically for that page, we are looking for a long-term partner to regularly perform this work for us.