Petite Star Zia is off sale at the moment as it infringes patents on another small 3 wheeler

Maclaren is probably too long for you
Silver Cross discontinued the product that did fit, the Compact, but it was awful
Britax Vigour 4+ might fit if you take the wheels of it as its smaller than a Bugaboo
A bit more guidance might help, do you want rearward facing? Will you just be using the car seat for from birth (not recommended)? What is your price limit?
Others to consider:
M&P Aria
Quinny Zapp
Britax Verve +
But all of these are forward facing only