Strap query

Afternoon OF, is there anyone able to shed a little light on some questions I have, I have tried searching some & found a little of the answers confusing so apologies if it’s already been answered before.
I have recently purchased a Seamaster pro 300m with the s/s bracelet on, however I’m looking at taking this off partially to preserve & wear on dress occasions. I am on the market for either a rubber strap & a nato one, some mention that I might need to additionally purchase curved pins? Can I not use my existing pins in the s/s one? Also any advise where to purchase them from as I have heard of crap ones that come out. Also what size would I need? 20mm pins? I’m assuming this is a fairly easy straightforward job, I have Bergeon spring bar tool & a set of Loupe’s to help.
Thanks all

Also if anyone has any straps, feel free to mention, I’m looking for any nato or rubber ones

I've gotten the '08s from a place called "Hovig's" but they appear to be out. An AD or OB should be able to help you. I don't know that I'd lose a lot of sleep using the existing 07s until I was able to locate the correct bars.

As for rubber straps, mine lives on this:

https://www.hirschstraps.com/products/hirsch-accent-natural-rubber-watch-strap-black

Zealande for rubber straps, can’t remember whether I used the Zealande spring bars or the ones from the bracelet.

https://zealande.com/products/rubbe...-300m-co-axial-42mm-black-ceramic-tang-buckle