I’ve been searching for steel chicago screws with a slotted binding post for a while and Chicagoscrews.com is offering them as a new product. As of May 21st, I don’t see them listed on the website, so contact their customer service and I’m sure they can make them available to you.
Aircraft structural repairs often require installation or replacement of threaded receptacles called anchor nuts, and students of BCIT’s Aircraft Maintenance Engineer’s ‘M” program will need to be familiar with all aspects of this work. Discussed here is one common method of locating the mounting holes using a drill jig. For more information see mlevel3.com