As far as
umbrella softbox type modifiers, here are some URLS and a comment or two:
Umbrellas For Speedlights
Steve Kaeser Enterprises: Umbrellas etc at
ACCESSORIES - Softboxes, Umbrellas and Reflectors - Steve Kaeser Photographic Lighting
A PAIR of 42-inchers sells for $29.95,
Softbox Umbrella Reflective 42inch
I own a pair of these—pretty decent, especially for the cost. PROS: light unit is at the front face of the umbrella, so triggers work, and the light can be swung up and down at steep angles if needed, even up to 90 degrees on a boom arm, so it can be placed over a table, or over a person, and the light ”rained down” directly as a hair light, etc. The monolight can be either inserted INTO the entire unit, OR can be allowed to stay outside! These will work with a monolight reflector as large as the Speedotron M90’s 8.5 inch diameter bowl reflector, and with ALL 7-inch monolight reflectors, and with all speedlight flashes mounted to an umbrella swivel mount. The drawstring closure system is fast and easy: I prefer it to the 3-zipper system the Lastolite Umbrella Box uses.
B&H Photos list of 19 models of “Softbox umbrella” products
Lighting Umbrellas | B&H Photo Video
The Photek Softlighter II is a more-rounded, 10-ribbed unit, for a more-rounded catchlight.
****AS mentioned above--this type of modifier typically does NOT offer either a grid accessory, nor a recessed front face; for those options, a rectangular or square softbox-shaped modifier is the most logical choice. Sometimes a grid accessory is super-helpful! At other times, not so much! The
recessed face of a square or rectangle box keeps side-spill to a minimum, and that can be handy to have that controlled without needing to "flag-off" side-spilling light rays with a card and another light stand.