I recommend the Fibaro Dimmer 2 modules. I have many and they work with or without a neutral. There is a really good device handler available. The dimmer 2 can be used with momentary or toggle switches, although for dimming its easier to use momentary switches.
There are a number of momentary switches available with many discussed on the forum. I have not tested these, but Varilight do a range of momentary switches. I had their V-plus IR installed successfully for over 10 years so hopefully the momentary are just as reliable.
Last thing. are you sure you have 3-wire in your switches? Its not common in the UK. Most of the time you just have a Live and return to the ceiling rose. this is one reason why Fibaro are popular here.