Reddit reviews To take arms: A year in the Provisional IRA

While the Tories themselves have an elected member that is a self-confessed ex-IRA member, who wrote a book in which she detailed going on a gun run to the continent...

There's also Maria McGuire's memoirs of her time in the PIRA at the start of the Troubles, though it's hard to get hold of these days: https://www.amazon.co.uk/Take-Arms-Year-Provisional-I-R/dp/0333145062

She later became a Tory councillor for Croydon. Make of that what you will.