If you do make it?
I've always made steak sauce the was my mum taught me - deglaze the pan with alcohol, usually red wine but whiskey/brandy/even tequila works, let it simmer then add pepper - ideally cracked black pepper - and a teaspoon of whatever mustards you have handy (usually 2/3), cook down then at the end stir in some cream. It's delicious but I'm the only one in my house who like (any kind of) sauce with steak.
Occasionally I buy a ready made one but these aren't as good. I like more sauces EXCEPT mushroom - hit me up please!