Not sure about the 95 S4S model, but I've just ordered a new key blank for my 2001 V8. I had to order the minimum of five so I will be selling four of them when they arrive next week. The current key is made by JMA and has the reference on one side of OP which is on top of WYP.
I believe the take away on the router vs laser point is there are apparently two different types of routers; automated and manual
I visited my local locksmith who looked at my original '98 key and blank I purchased separately and said yep, I can duplicate that, went to his shop section, came back couple minutes later and said nope cannot do without a manual key duplicator which he indicated are hard to find
Keep in mind, I know nothing about key duplication technology