We won't get a like for like Stewart replacement, that's just the way it is.
Brentford are the perfect example of how this works.
In 2014 they paid £950k for Scott Hogan from Rochdale. 22 years old and had just scored 17 goals in League Two. Not a household name. 2 years later, they sold him (by this time their top scorer) to Villa for £9.5m. They weren't able to bring in a player who could provide the same goal threat that Hogan had, so they invested in 2 younger players instead.
21 year old Ollie Watkins (£6.5m from a League 2 club) was the main replacement - Hogan scored more goals in the Championship the year he was sold than Watkins scored in League 2. They spent the other £2m in an unknown 20 year old French lad who wasn't cutting it in the Saint Etienne team (Neal Maupay).
Maupay did well and was sold 2 years later for £15m. Watkins took 3 seasons of continuous improvement but eventually became a player that Villa paid £33m for.
When Brentford lost their main striker Maupay, they didn't spend £15m on a replacement or break the bank to try and get him to stay. They spent the money on 4 players - 19 year old Bryan Mbeumo, Ethan Pinnock, David Raya and Christian Norgaard.
When Watkins left (the same time as Benrahma) for a combined £60m, they spent less than £10m. Not on someone who had proven themselves in the Premier League or Championship. They spent it on 23 year old League One striker Ivan Toney.
Brentford didn't just sell their star striker once and replace them with someone less proven, they did it 3 times and also in multiple other areas of the pitch. The point being that selling Stewart won't be the end of the club and anyone we bring in needs to be given time. That's what the model is all about.