This video, via Erica Synths, takes a look at their DIY MIDI to Clock module. 

Here’s what they have to say about the module:

Simple, easy to build and cost-effective DIY and assembled MIDI TO CLOCK module allows to sync modular setups and analogue sequencers to midi sequencers, drum machines and other midi controllers. The module has low part count and doesn’t need calibration.

Details on pricing and availability are to be announced. See the Erica Synths site for information.