Valve cover bolts?

I take it you need the bolts. We don't have parts here. We just dispense wondrous wisdom and advice. As such, your best bet is to get replacements from any salvage yard. My preference is the pick-your-own parts yards that have sprung up all over. One noteworthy chain is "Pull-A-Part". They have over two dozen yards that are extremely clean and well organized. I've been to 16 of them. Customers and employees have always been very friendly and helpful. There are many similar yards today.

Another option, if you still have at least one bolt, is to visit any hardware store. They have gauges that will tell you the size, thread pitch, and whether or not it is metric.

Be aware that bolts on engines very often have an unusual design to prevent or solve some problem. The head may be extra wide to distribute the force and prevent cracking the part around the head, such as that valve cover sheet metal. With a standard bolt, you may need to add a washer for that purpose. Sometimes you'll find little teeth under the head to help it bite in to prevent working loose.

Engine bolts also often come in non-standard lengths. A replacement that is too short may not develop enough friction in the threads to keep it from vibrating loose, ... And a leak. Valve cover bolts thread into "blind" holes meaning there's no hole on the other end for the bolt to come through. A bolt that's too long could bottom out at the end of the threaded hole, then appear to become snugged down when, in fact, it hasn't developed any clamping force. That too can result in a leak.

I did look up the exploded view of your engine, and, as expected, they didn't show the bolt sizes. In fact, they didn't even show the bolts. I found another source that says your bolts are 1/4-20, meaning 1/4" by 20 threads per inch, but it didn't give a length. I'm a little wary because by '94, GM had been using metric fasteners for a long time. What also happened with many manufacturers is they held over the standard fastener sizes to the next year(s), and only switched to a metric size when a new part was developed. A good example could be when GM switched to a new generator design in '87, it would have been built with all metric fasteners, while the carburetor could have been the same as used in previous years, so it still had standard fasteners. We fought with a mix of standard and metric fasteners on one vehicle for many years.

Let me know if that helps and you solve this.