Strap for ladies speedy

[dieselpower]

Hello,

I am sorry for asking probably a stupidly noob question but I'm more often involved with vintage Rolex although I am the proud owner of a gen Speedmaster Pro. However, a good friend has a ladies Speedmaster (38mm) I think, and she wants a new strap (leather) but does not want to spend Omega money. Simple question - what do you experts recommend? I assume that the fancy Omega buckle means that you need a specific design strap to accomodate it? Hope this makes sense. Look forward to advices. Rep or quality aftermarket welcomed.