Summary

Decided to make one as I didnt find one available,
FIY:
the thickness is part of the calculations I made when modeling this ,
so make sure it about 0.7 mm

Print Settings

Printer Brand:

FlashForge

                                            <p class="detail-setting printer"><strong>Printer: </strong>                     <div><p>Creator Pro</p></div></p>                                                                                <p class="detail-setting rafts"><strong>Rafts: </strong>                     <div><p>No</p></div></p>                                                                                <p class="detail-setting supports"><strong>Supports: </strong>                     <div><p>No</p></div></p>                                                                                <p class="detail-setting resolution"><strong>Resolution: </strong>                     <div><p>0.22</p></div></p>                                                                                <p class="detail-setting infill"><strong>Infill: </strong>                     <div><p>0%</p></div></p>                                                        <br>                        <p class="detail-setting notes"><strong>Notes: </strong>                    </p><div><p>Printed in vase mode , single outline of 0.72 mm ( over extruded out of a 0.6 nozzle )<br>the top part can be printed if you wish ( i did ) just make the infill pattern concentric and not rectilinear<br>also the wide side should be the contact point with the bed.</p></div>

Post-Printing

top part retouching

            <div><p>basically you can use the diffuser as a spot , it will soften the edges and reduce light output , but even if you dont , you may want to sand it to a matt (consistent)  finish </p></div>

How I Designed This

www.onshape.com

            <div><p>best place online for making stuff that are not just fun to look at</p></div>

Speedlite 600EX II-RT BIG round diffuser